Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, 1), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.
A149755
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, 1), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =83a(5) =333a(6) =1645a(7) =7195a(8) =35733a(9) =162789a(10) =810585a(11) =3784801a(12) =18875529a(13) =89559607a(14) =447055739a(15) =2144687329a(16) =10711656671a(17) =51798394103a(18) =258799786711
External references
- oeis: A149755